US Bridges

S-21-575 over Willow Creek

Good

Florence County, South Carolina · 4.5 MI S Claussen · Structure no. 000000000008846

Built
1995
30 years old
Condition
Good
inspected March 2023
Type
Slab
Concrete Continuous
Length
120 ft
4 main spans
Daily traffic
1,350
2023 count
Owner
State
State Highway Agency

About this bridge

S-21-575 over Willow Creek is a concrete continuous slab carrying S-21-575 over Willow Creek in Florence County, South Carolina. It was built in 1995, so it is 30 years old, younger than the South Carolina average of 48 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,350 vehicles a day, roughly 15% of them trucks, projected to reach 1,971 by 2043. The structure is 120 ft (36.6 m) long and 35 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesS-21-575
CrossesWillow Creek
Location4.5 MI S Claussen
RouteState Highway 575
CountyFlorence County
StateSouth Carolina
Coordinates34.07896, -79.64277
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating50.4 US tons
Inventory rating38.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 25 or greater
Structure length120 ft (36.6 m)
Longest span30 ft (9.1 m)
Deck width35 ft (10.6 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,350 (2023)
Projected traffic1,971 by 2043
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was S-21-575 over Willow Creek built?

It was built in 1995, making it 30 years old in 2025.

What condition is S-21-575 over Willow Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in March 2023.

How much traffic does S-21-575 over Willow Creek carry?

About 1,350 vehicles per day (2023 count), of which roughly 15% are trucks.

How long is S-21-575 over Willow Creek?

The structure is 120 ft (36.6 m) long with a longest span of 30 ft (9.1 m) and a deck 35 ft wide.

Who owns S-21-575 over Willow Creek?

It is owned by the State Highway Agency.